Anyway we can get an upgrade pack for 1st run purchasers?
I doubt GBG would do that, it doesn't seem cost effective. The changes were mainly just rulebook and grammatical errors, so if you already know how to play the game I see no need to want the 2nd edition over the first, especially if you already own it.
The biggest change I'd say would be to the Daemon archetype, and I've uploaded the 2nd edition version to BGG. So you can print the changes to that card if you feel like you want them.